I currently study criminology, law and digital media and I'm just about to go into year 13. However, I received my end of year results back in August for year 12 and I got 2 A's (law and digital media). However for criminology, overall I got a D but there are two modules one in which I got a D and an E. I have been suggested to resit both of them but I decided to resit the one where I got an E since it's particularly bad. I'm trying to achieve an A at least by the end of year 13, but I don't see myself being able to achieve it...are there any tips/advice on how to boost up my grade?